It technically works with more phones than what the Blackberry website is listing, so check your service provider to make sure that it's supported. http://www.blackberry.com/ap/products/connect/symbianOS.shtml The OS on the N91 is "Symbian OS v9.1, Series 60UI 3rd Edition." ~Joe Sorry about any confusion yesterday. I was in meetings all day, and was checking email with my Blackberry handheld. It's not condusive to writing long or well thought out replies due to the lack of speech output or tiny thumb board. But it's portable, and works [with some effort] when typing short replies.